Sumary of Cyclospora infections continue to increase; no common source found yet:
- The number of reported cases of domestically acquired cyclosporiasis illnesses has increased by 254 cases since the last update on July 14, 2021. Cases continue to be reported to the Centers for Disease Control and Prevention.
- As of July 27, there have been 462 laboratory-confirmed cases of cyclosporiasis in people who had no history of international travel during the 14-day period before illness onset.
- Illness onset dates range from May 1 to July 16. However, there are likely more infected patients, officials say, because of the lag time between a person becomes ill and when confirmed test results reach federal officials.
- Cyclosporiasis illnesses develop from infections by the Cyclospora parasite, a microscopic organism.
- The CDC, along with state and federal health and regulatory officials, monitor cases of cyclosporiasis in the United States in the spring and summer months to detect outbreaks linked to a common food source.
- However, many cases of cyclosporiasis cannot be directly linked to an outbreak, in part because of the lack of validated laboratory “fingerprinting” methods needed to link cases of Cyclospora infection.
- Officials use questionnaires to interview sick people to determine what they ate in the 14-day period before illness onset.
- Cyclospora cayetanensis is a unicellular, microscopic parasite that can cause food- or water-related gastrointestinal illness.